Topic Hubs™ are web-based guides to peer-reviewed pollution prevention information and expertise on a particular subject. Each hub is developed and maintained by a P2Rx regional center. See a complete list of Topic Hubs™.

The Pollution Prevention Resource Exchange (P2Rx™) is a consortium of eight regional pollution prevention information centers, funded in part through grants from EPA. These centers provide pollution prevention information, networking opportunities and other services to States, local governments and technical assistance providers in their region. The centers represent a broad constituency, including state and local pollution prevention programs, manufacturing extension partnerships, cooperative extension and nonprofit organizations.

The Great Lakes Regional Pollution Prevention Roundtable (GLRPPR) serves the Great Lakes region of the United States (Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin) and Canada (Ontario).